Legality controversy over "sanctuary policy"

California has implemented a "sanctuary state" policy since 2017, refusing to cooperate with federal immigration law enforcement. The Tenth Amendment to the U.S. Constitution explicitly protects state rights and stipulates that the federal government cannot force state governments to assist in law enforcement. Federal courts have previously ruled that California's policy is legal, but the Trump administration still puts pressure on the grounds of "national security" and even threatens to arrest Governor Newsom, constituting a blatant violation of state autonomy.